Tubular drill



Sept. 11, 1923. 1,467.45!

J; H. PHILLIPS TUBULAR DRILL Original Filed July 21. 1919 Patented Sept. 11, 1923.,

JOHN E. PHILLIPS, OF CHICAGO, ILLINOIS.

TUBULAR DRILL.

flriginal application flied July 21, 1919, Serial No. 312,243. Divided and this application filed November 22', 1919. Serial No. 340,028.

To all whom it may concern:

Be it known that I, JOHN H. PHILLIPS, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Tubular Drills, of which the following is a description.

My invention belongs to that general class of devices known as stone drills or the like and relates particularly to a. tubular, hollow, shell or core type of drill for drilling holes in concrete, brick, stone or like material. The drill, when constructed in two or more parts, may also be utilized as an anchor or expansion shell for fastening and holding various devices and mechanisms to said material. This, however, is more fully set forth in my pending application, Serial No. 312,243, filed July 21, 1919, this being a divisional application thereof. My invention has among its objects the production of a drill of the kind described, that is simple, convenient, efiicient, durable, responsive and suitable for use wherever found applicable. More especially it has among its objects the production of a drill which will be rapid in operation and drill a clean cut hole in which the drill itsef or equivalent shell parts may thereafter be inserted for anchoring purposes. Many other objects and advantages of the construction herein shown and described will be obvious to those skilled in the art, from the disclosure herein made.

To this end my invention consists of the novel construction, arrangement and combination of parts herein shown and described and more particularly pointed out in the claims.

In the drawings, wherein like reference characters indicate like or corresponding parts,

Figure 1 is a sectional view through a two part drill,

Figure 2 is a view in elevation of the same, seated in a chuck, shown in section,

Figure 3 is a sectional view of a modified form of drill, the arated,

Figure 4 is a view in elevation of a slightly different construction,

Figure 5 is a sectional view through the same seated in the chuck, only a portion of the chuck being shown,

Figure 6 is a sectional view illustrating slightly parts being sepview ofstill another the same maybe economimanufactured and in many cases the same may be made of cheap material and case hardened. In this case the same may be punched from a bar and after forming in a press the same may be case hardened, which means rapid production and low cost enabling a cheaper drill to be produced. In the construction of the device shown in Figure 1, the drill consists of two parts which are provided with cutting teeth or edges 3 at one end, the cutting end beingpreferably slightly larger forclearance as at 4. The parts are made of suitable material inthe preferred way and of the desired size. The end opposite the cutting edges is arranged'to engage in the suitable chuck. As shown, the same is tapered as at 55 and I prefer to provide holes or notches 6 in each drill part which register when the two drill parts are together forming holes. This form of the device is also preferably cut away as at 7 so as to form incline faces on the two parts; As shown in Figure 2, 8 represents the head of a suitable chuck or holder provided with a shank of the desired size. The head is recessed as at 9 so as to receive and fit the tapered end 5-5 of the drill. The same is also provided with a tubular bore 10 having an opening 10 at the base through which the drillings may escape, so that the same do not clog up the drill or require the drill to'-- be removed for cleaning. The chuck may be operated in any suitable manner, not necessary to describe herein, the same being substantially of the type known as the reci rocating or percussion chuck which may e operated by a spring, compressed air, electric, hand or other suitable type of hammer. The number of holes which may be drilled By constructing the same in with this drill will vary according to the material from which it is made and the method of making and, according to the material to be drilled. One of the advantages of this shell or core type of drill which may be mentioned here over other types of u ted , 7-7 provides a clearance space so that the drillings may escape from the end into the tubular bore. The same also serves as faces for the expanding mechanism when the same is used as a shell. In case the parts wedge in the chuck tightly, the insertion of a tool in holes 6 easily loosens the same for removal from the chuck.

The construction shown in Figure 3 is substantially similar, except that the parts are not cut away to provide the faces 7-7. Figures 4 and 5 show what may be termed a straight end or flush type of drill slightly modified in construction but embodying the salient points of the drill previously described. Referring to the figures, this type is shown consisting of the two parts 11 and 12 formed with the cutting edges or faces 13 and slightly flared as at 14. The drill parts are also shown with corrugations or ribs, so as to provide a fluted exterior as at 15. In this case holes 16 arranged adjacent the opposite end and the incline faces 17 are arranged at the end of the drill opposite the cutting edges. The chuck consists of a tubular part 19 which may be formed with the projecting parts 18, 20 beingan adjustable retaining collar which maintains the chuck in place, but which may be used so that the drill may drill in flush with the end of the chuck 19.

In the type of drill shown in Figure 6, the same may also be of one or more parts.

As shown, it consists of two parts 21 and 22 formed with the cutters 23 at one end, the same being arranged at the opposite end with holes 27 and adapted to seat on the shoulder 25 formed in the chuck 24. The

chuck 24 is shown with the projecting lugs 26 arrangedto fit in the cut away portlon 27 and with the holes 27 In this case the chuck is also tubular as indicated at 28 and provided with an opening'29 at one side through which the drillings will be discharged. In the drill shown in Figure 7, 31 and 32 represent the two parts formed with the cutting end 33 and with ribs or corrugations 34. This type of drill also has a flared or tapered end 35 and holes 36.

Where the device is to be used only for drilling, the same need only be made in one part, but where it is to be thereafter used as an expansion shell, or part thereof, as described in my a plication referred to, of which this is a divisional application, the same is preferably made in one part and slotted, or of two or more parts. Making the cation or claims, I wish to be understood as meaning any style of cutting edges, faces or the equivalent.

Having thus described my invention, it is obvious that various immaterial modifica tions may be made in the same without departing from the spirit of my invention, hence I do not wish to be understood as limiting myself to the exact construction, arrangement, combination of 'parts or uses mentioned.

What I claim as new and desire to secure by LettersPatent is:

1. A drill consisting of a tubular shell provided with cutting teeth at one end and constructed with a taper at the opposite end, terminating at a point intermediate the shell ends, said tapered end having an opening through the walls thereof.

2. A percussion'drill comprising a plurality of similarly formed parts arranged together to provide a tubular shell, the parts at one extreme end of the shell formed with cutting teeth about the edge, said parts being cut away at their juncture adjacent said toothed end and inwardly beyond said teeth toprovide a substantially V-sh'aped recess extending inwardly beyond the base line of said teeth, whereby when the drill is o erated the drillings will pass through tl i bore of thetubular shell.

3. A percussion drill comprising a plurality of similarly formed parts arranged together to provide a tubular shell, the parts at one extreme end of the shell formed with cutting teeth about the edge, said parts being cut away at their juncture adjacent said toothed end and extending inwardly beyond the base line of the teeth to provide a substantially V-shaped recess whose side walls are mutually convergent from their inner to their outer peripheries, whereby when the drill is operated the drillings will pass through the bore of the tubular shell.

4. A tubular drill comprising a plurality of similarly formed parts arranged together to form a shell, said parts at one end of the shell enlarged and rovided with teeth at the extreme end of t e parts, and the oppoof similarly formed parts arranged together to form a shell, said parts at one end of the shell enlarged and provided with teeth about the edge, said parts being cut away at said toothed end to provide a substantially V- shaped recess therein, and the opposite end of the'shell parts being tapered to engage a cooperating chuck, said parts formed with an opening therethrough adjacent said tapered end.

6. A tubular drill comprising a plurality of similarly formed parts arranged together to form a shell, said parts at one end of the shell being enlarged and provided with 15 teeth about the edge, and the opposite end vergent from their inner to their outer 20 peripheries, said parts being formed with an opening therethrough adjacent said tapered end.

In testimony whereof, I have hereunto signed my name in the presence of two sub- 25 scribing witnesses.

, JOHN H. PHILLIPS. Witnesses:

RoY W. HILL, BERNICE DELANEY. 

